Company XYZ is redesigning their QoS policy. Some of the applications used by the company are real- time applications. The QoS design must give these applications preference in terms of transmission.

Weighted Fair Queuing distributes bandwidth proportionally among active flows but provides no strict priority queue, so real-time traffic still experiences variable and potentially high delay during congestion.

Weighted Random Early Detection is a congestion-avoidance tool that preemptively drops TCP segments to prevent queue saturation, but it does not prioritize or provide low-latency treatment for real-time traffic classes.

Low-Latency Queuing combines a strict Priority Queue with Class-Based Weighted Fair Queuing (CBWFQ), ensuring that packets placed in the priority class are always dequeued before any other class is served. This guarantees minimum delay and jitter for real-time traffic such as voice or video while still providing proportional bandwidth guarantees to all remaining traffic classes, making it the standard Cisco QoS strategy for latency-sensitive applications.

First-In First-Out processes all packets in strict arrival order with no traffic classification or differentiation, offering no preferential treatment for delay-sensitive real-time applications.